allentown, p.a. orchestra, which diane wittry conducts. >> they play great. they have fabulous technique, great sound, great intonation. >> reporter: so then the obvious question: how do you decide whom to hire? >> it's almost like the olympics. my harp player-- i was just talking to her during rehearsal, and she had recently taken an audition, they give you a piece that's really hard, and if you do really well in that one, you get to play another piece, and then do really well on that one, you get to play another piece, and she was on the sixth excerpt and then she messed up and missed a note. and then it's like, "thank you very much." >> reporter: come on, one note? >> yes, you make a mistake and you're out. and that's how competitive it is in the audition process. >> reporter: and if you think it's tough for instrumentalists, what about dancers? each dance class at juilliard starts small, 24 students or so, and gets even smaller, through attrition. there are job opportunities for male dancers, less competition for each slot.